Insulated structure



Nov. 20, 1934. H. B. LINDSAY INSULATED STRUCTURE Filed July 28, 1932 2 Sheets-Sheet l fiaerzzar Wr g Nov. 20, 1934. H. B. LINDSAY' INSULATED STRUCTURE Filed July 28, 1932 2 Sheets-Sheet 2 dfijd.

Patented Nov. 20, 1934 PATEN T OFFICE INSULATED STRUCTURE Harvey B. Lindsay, Evanston, 111., assignor to Dry Zero Corporation, Chicago, 111., a corporation of Delaware Application July 28, 1932, Serial No. 625,495

1 Claim.

My invention relates generally to insulated structures but more particularly to insulating slabs formed of masses of insulating material, such as for example ceiba fibre, enclosed in a cas- 5 ing, and which are of such character as not to present the desired resistance to crushing under all conditions of use.

My objects are to provide against such objectionable crushing of the slabs; to provide means for this purpose which shall be provided as a part of the slab; and other objects as will be manifest from the following description.

As refrigerator structures, by way of example, sometimes present a condition rendering desirable the utilizing of my invention, I have chosen to illustrate it in this connection, a. description of the accompanying drawings being as follows:

Figure 1 is a view in vertical sectional elevation of a refrigerator in which my invention is embodied, the section being taken at the irregular line 1 on Fig. 2 and viewed in the direction of the arrow.

Figure 2 is a similar view of the refrigerator,

the section being taken at the irregular line 2 on Fig. 1 and viewed in the direction of the arrow.

Figure 3 is a perspective view, with certain parts broken away, of one of the insulating slabs of the refrigerator and embodying my invention.

Figure 4 is a plan section of the, slab of Fig. 3, the section being taken at the line 4 on Fig. 3 and viewed in the direction of the arrow.

Figure 5 is a broken sectional view of a modification of the slab of Fig. 3; and

Figure 6, a similar view of another modification of the slab. I

' Referring to the particularconstruction shown and connection with which I have chosen to 40. illustrate my invention, the refrigerator, in accordance with common practice, comprises an outer shell '7 forming the housing of the refrigerator structure and having a door opening '1,

a horizontal partition plate 8 in the shell 7 and dividing the interior thereof into an upper compartment 9 and a lower compartment 10, and an inner shell 11 affording a space in which the articles to'be refrigerated are to be located,

mounted in the compartment 9 and spaced from the walls thereof throughout the extent of the latter and affording with these walls a space 12 entirely surrounding the inner shell 11 except at the door opening.

The surrounding space 12 is provided for receiving the insulating material which, in the construction shown, is in the form of slabs.

The one of the slabs 13 located in the space between the bottom of the inner shell 11 and the partition 8, in the particular construction shown, is liable to be subjected to downward pressure exerted against it by the inner shell 11 and tending to crush the slab and therefore, in accordance with my invention, I provide means for relieving this slab of such undue pressure.

In accordance with the particular embodiment of the invention illustrated in Figs. 14, inclusive, the means referred to are carried by the slab and comprise blocks 14 preferably of triangular shape fitting the four interior angles at the corners of the enclosing structure 15 for the massl6 of insulating material, such as ceiba fibres, the blocks being cemented in place in these corners and vertically disposed to resist the downward force exerted by the inner shell 11 thereby protecting the slab against crushing.

The enclosing structure 15 for the mass 16 of insulating material comprises, in the-particular construction shown, an inner box, as for example of light weight chipboard, wrapped and sealed in tacky asphalt-coated paper and shown as provided with a continuous marginal attaching flange which may be used when conditions render it advisable.

In the construction shown in Fig. 5 the means for resisting the compressive forces exerted against the slab are in the form of bars 1'1, two only of which need be used, located at opposite edges of the slab, these bars which are preferably cemented to the inner surface of the enclosure structure 15 as for example by tacky asphalt, being located in the plane of the mass v16 and being of a height substantially equal to the vertical height of the slab as in the case of the blocks 14, thereby serving to protect the enclos- 95, ing structure '15 and the mass 16 within it, from compressive forces exerted by theinner shell 11.

The structure shown in Fig. 61s the same as that shown in Fig. 5 except that the bars corresponding to the bars 17 and herein represented at 18 are secured, as by tacky asphalt, to the exterior surfaces of the'end portions of the slab instead .of being located within the interior of the enclosing structure 15.

The blocks 14 and members 17 and 18 may b121 5 of any desirable material which will present the desired resistance to compression and present reasonably low conductivity, as for example wood or insulating board.

is resilient, the use of compression-resisting members at the interior angles only of the corners of the enclosing structure 15, as in the case or the blocks of Figs. 3 and 4; does not result in spaces being formed between'the mass 16 of instilating material and the compression-resisting members and which would permit 01' ready leakage of heat therethrough, as the material 16 is resilient and closely conforms to the faces oi. the blocks ex. posed at the interior of the slab and the inner surfaces of the enclosing structure 15.

While; have illustrated and described certain particular constructions constituting embodiments of my invention, I do not wish to hemderstood as intending to limit it thereto as the invention may be provided in other forms of characteristics of wood, located at'and confined substantially to the vertical angles of the unit; the unit being thus adapted to support the weight of a refrigerator liner without collapse.

" HARVEY B. LINDSAY. 

